Commonwealth v. Mangel
- Court
- Superior Court of Pennsylvania (State appellate court)
- Decided
- 2018
- Citation
- 181 A.3d 1154 (Pa. Super. 2018)
- Standard applied
- Pa.R.E. 901 — social-media authentication
What the court held
The Superior Court affirmed an order denying the Commonwealth's motion in limine to admit Facebook posts and chat messages, holding that authentication of social-media evidence requires more than a matching name and general identifiers. Because nothing tied the account or the messages to the defendant as author and the chats contained no contextual clues identifying him as the sender, the trial court did not abuse its discretion in excluding them.
Why
The court reasoned from Pennsylvania's existing authentication framework — testimony from a witness with personal knowledge under Rule 901(b)(1), or distinctive characteristics under Rule 901(b)(4) — and from the state's earlier instant-message and text-message cases holding that an address or account name alone is inadequate to identify an author. It noted that the Third Circuit had applied a preponderance standard to Facebook records but found the Commonwealth's showing insufficient under any of these formulations.
Our reading — not the court’s words
Why this matters in practice
Mangel is the case most often cited by the party opposing a social-media exhibit, and it identifies exactly the gap that sinks such exhibits: a screenshot proves a page existed, not who wrote it. It should be read as a specification for the forensic work that would have succeeded — account registration and login records from the platform, device artefacts, or content only the defendant could have supplied — rather than as a bar on social-media evidence. Practically, it means a Facebook account bearing the right name and hometown is the start of the authentication case, not the end of it.
This paragraph is Legal Cyber Academy’s editorial assessment of the decision’s practical importance. The court said none of it. For what the court actually said, read the opinion.
Additional detail
Tags: Facebook · social media · authorship · motion in limine
Cited 81times in CourtListener’s corpus at the time this entry was compiled. Treat it as a rough measure of influence, not of correctness.
Other decisions on authentication
- Tienda v. StateCourt of Criminal Appeals of Texas · 2012The court affirmed the admission of printouts from MySpace profiles attributed to the defendant, holding that the internal content of the pages — photographs, r…
- People v. GoldsmithCalifornia Supreme Court · 2014Photographs and video from an automated traffic-enforcement system were adequately authenticated by the testimony of an investigating officer, and were not hear…
- United States v. HassanCourt of Appeals for the Fourth Circuit · 2014Screenshots of Facebook pages and YouTube videos were self-authenticating as business records under Rule 902(11), supported by certifications from the platforms…
- Lorraine v. Markel American Insurance Co.District Court, D. Maryland · 2007Neither party's electronic exhibits could be considered because none was authenticated: e-mails were simply attached to the motions rather than supported by aff…
- United States v. VaynerCourt of Appeals for the Second Circuit · 2014A printout of a profile page from a Russian social-networking site was admitted without adequate authentication under Rule 901, because the government offered n…
- Commonwealth v. PurdyMassachusetts Supreme Judicial Court · 2011E-mail exchanges recovered from a computer the defendant admitted owning, and for which he supplied all the passwords, were sufficiently authenticated as his, a…
Summarised from the opinion as retrieved from CourtListener. Reference material, not legal advice. Back to the repository.